Bottomappbar not seen properly

Question

I'm trying to put a bottomAppBar to mainActivity. So I tried and check lots of stuff in here but couldn't find any solutions.

MainActivity's XML code is below(It has another constraint layout as a parent but didn't add here.)

<androidx.coordinatorlayout.widget.CoordinatorLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.bottomappbar.BottomAppBar
        android:id="@+id/bottomAppbar"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_gravity="bottom"
        android:backgroundTint="@color/colorGray"
        app:fabAlignmentMode="center" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_anchor="@id/bottomAppbar"
        app:fabCradleRoundedCornerRadius="-10dp"
       />

</androidx.coordinatorlayout.widget.CoordinatorLayout>

So after that, I prepared a bottomappbar_menu.xml in menu directory and I tried to attach this menu to my MainActivity file's OnCreate method like below:

bottomAppbar.replaceMenu(R.menu.bottomappbar_menu)

Also styles.xmsl is like below,

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

</resources>

But when I install to phone, it's seen like below. I don't see any menu item:

Answer 1

It seems a problem I had.

Are you using

setSupportActionBar(bottomAppBar);

together with replaceMenu?

In that case, remove setSupportActionBar and everything should work.